code: def round_robin_strategy(num_tasks, last_task=None):
      """A function for sampling tasks in round robin fashion.
  
      Args:
          num_tasks (int): Total number of tasks.
          last_task (int): Previously sampled task.
  
      Returns:
          int: task id.
  
      """
      if last_task is None:
          return 0
  
      return (last_task + 1) % num_tasks
  
file_path: garage/src/garage/envs/multi_env_wrapper.py
imports: import random
  import akro
  import numpy
  from garage import EnvSpec, EnvStep, Wrapper
label_desc: Use image node_id 1 for calling a global function with example usage: round_robin_strategy(num_tasks, last_task) and returns: unknown, int